RHINENG-26506: security update for pgx and related packages

[TenSt]

CVE-2026-33816 applies to pgx version 5.9.0 or below. We already have 5.9.2, but just in case let's update the version to the 5.10.0 which is the current latest one.

Summary by Sourcery

Update PostgreSQL driver dependency and clean up unused indirect modules in go.mod.

Build:

• Bump github.com/jackc/pgx/v5 from v5.9.2 to v5.10.0.
• Remove unused indirect Go module dependencies from go.mod to simplify the dependency graph.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Updates pgx to v5.10.0 to address a security concern and prunes unused indirect dependencies from go.mod (with corresponding go.sum updates).

File-Level Changes

Change	Details	Files
Upgrade pgx dependency to a secure version and refresh indirect module set.	Bump github.com/jackc/pgx/v5 from v5.9.2 to v5.10.0 in go.mod to pick up security fixes. Remove several no-longer-needed indirect dependencies from go.mod (likely due to go mod tidy or transitive dependency changes). Regenerate go.sum entries to align with the updated module graph (implicit in the diff, even if not fully shown).	go.mod go.sum
Prune unused documentation/CLI-related libraries and legacy YAML helpers from the dependency graph.	Drop indirect dependencies related to markdown rendering and CLI tooling (e.g., blackfriday, go-md2man, urfave/cli, sanitized_anchor_name, xrash/smetrics) that are no longer referenced by the code or other modules. Remove indirect YAML helper libraries (gopkg.in/yaml.v2 and sigs.k8s.io/yaml) now superseded or unused, relying on gopkg.in/yaml.v3 instead.	go.mod go.sum

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 58.34%. Comparing base (cdfe0b9) to head (e95df34).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2233      +/-   ##
==========================================
+ Coverage   58.32%   58.34%   +0.02%     
==========================================
  Files         140      140              
  Lines        8967     8967              
==========================================
+ Hits         5230     5232       +2     
+ Misses       3189     3187       -2     
  Partials      548      548              

Flag	Coverage Δ
unittests	58.34% <ø> (+0.02%)	⬆️

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